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A hospital administrator wanted to know if the nurses at her hospital preferred one brand of stethoscope over another. She gave 3 nurses a different stethoscope to try out each week and asked them to rate their liking for that stethoscope on a scale of 1 to 5 (1 = hated it, 5 = loved it). Was there any difference in the nurses' preference in brand (α = 0.05)? Show all necessary components of a full hypothesis test, including a source table.
Nurse
Littmann (A)
Prestige Medical (B)
ADC (C)
1
5
3
2
4
Jones Nissan in Sumter, South Carolina, sold 15 Nissans yesterday. What is the probability that exactly 0 vehicles require warranty service?
A professor is targeting a score of 80 on an exam. His forty-nine students averaged 78 on an exam with s = 7. Are the scores significantly less than 80 at a significance level of 0.05? Show your work and state the conclusion.
Compute the probability that debt for a randomly selected borrower with good credit is more than $18,000?
B is independent of C or not? Focus on probabilities assigned in the subsets, 0.05 is repeated in C, but 0.10 is repeated in B, so P(A∩C)=?
Develop percent frequency distribution and construct bar chart and pie chart.
A sample of 140 golfers showed that their average score on a particular golf course was 93.38 with a standard deviation of 4.36. Answer each of the following (show all work and state the final answer to at least two decimal places.):
Change the frequencies to percentages - is there a group more likely to get high salaries.
If an employee is selected at random, what is the probablity that the employee is female or works as a member of admin?
Is spine bone density is normally distributed in young women with a mean of 1.0 g/cm 2 and a standard deviation of .10 g/cm 2 , then how many young women out of 100 would you expect to have bone densities less than .85 g/cm 2 ?
Formulate the hypothesis that can be used to determine whether the sample data support the hypothesis that the mean fuel efficiency rating for midsize cars is greater than the mean fuel efficiency for large cars.
A pharmaceutical company has developed a drug that is expected to reduce hunger. To test the drug, three samples of rats are selected with n=10 in each sample.
Calculate the "t" value for independent groups for the following data using the formula presented in the module. Check the accuracy of your calculations.
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